Robson stars as Liam Marple, a top undercover tabloid journalist who writes a column under the pseudonym 'Mrs Jones.' Prior to a General Election he is given the task of investigating the female Prime Minister, Laura Bowden (Caroline Goodall), in the hope of exposing any dirt she has to hide. Posing as a party fundraiser, Liam manages to gatecrash an important event to gain material for another highly critical article about the government under his pseudonym, but his encounter with the Prime Minister provides more than column inches; to Liam's surprise there is a powerful attraction between them.
Laura doesn't know Liam's identity as the infamous columnist Mrs Jones. To her, he is a political fundraiser - with whom she falls in love. He helps her forget her failing marriage and plummeting popularity. The real Liam, however, is still sniffing for a scoop. But slowly, Liam falls for Laura too, making his life as Mrs Jones more and more untenable. Then, in a last-ditch attempt to save his career, Liam is asked to break a sensational story about the PM's husband. Will Liam's conscience allow him to go through with the plan?
As the election looms, his ruthless editor - and ex-wife - Jane (Keeley Hawes) becomes convinced Liam is losing his edge, while he's more worried that his new lover will discover who he really is. Liam's actions final reveal his true identity to a heart-broken Laura. The couple split and Laura faces the last week of her election campaign feeling emotionally alone. But Liam's love has changed Laura for the better. And made her a better politician.
Will she and Liam be reunited as lovers? Liam is now pursuing his dream to become a novelist. Will he and Laura be able to re-write the end of their affair?